Blender to create a "skin" for a model?
I dont' know if this at least partly answers, but this is a "skin" I built around a "phone" mesh... obviously very simple, and rough, that fits it nicely, because I built it as said above, duplicating the "phone" mesh, cutting "holes" where necessary, and then scaling it up a bit in every direction...



then, the skin cover could be decorated as needed, rendered etc.